Means for raising and lowering casting-machine melting-pots.



I. S. BANCROFT & M. INDAHL.

MEANS FOR RAISING AND LOWERING CASTING MACHINE IVIELTING POTS.

APPLICATION nun AUG-7.1915- 7' 1,220,056. Patented Mar. 20, 1917.

2 SHEETS-SHEET l- J. S. BANCROFT & M. C. INDAHL. MEANS FOR RAISING AND LOWERING CASTING MACHINE MELTING POTS.

APPLICATION FILED AUG-1| 19I5.

Patented Mar. 20, 1917.

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JOHN SELLERS BANCROFT AND ivrAnarrz c. INDAHL, or PIFLILADELPHIA, PENNSYL- VANIA, ASSIGNOB-S TO LANSTON MONOTYPE MACHINE COMPANY, or PHILADEL- PBIIA, PENNSYLVANIA, AVCORPORATION or VIRGINIA.

MEANS FOR RAISING AND LOWERING CASTING-MACHINE IVIELTING-POTS.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Application filed August 7, 1915. Serial No. 44,275.

part of this specification, and to the figures and letters of reference marked thereon.

This invention relates to the casting machines of the Lanston Monotype system, wherein the molten metal is held in amelt ing pot which must be capable of vertical movement into and out ofits operative position, as well as a swinging movement whereby it may be turned off to one side so as to give access to the mechanism, as well as to give access to the parts immediately associated with the melting pot itself. As here tofore constructed, it has been necessary for the attendant to pass around to the rear side of the machine, whenever the melting pot was to be moved into or out of its operative position, and to manipulate the same by a details of construction and combinations and arrangement of parts, all as will be hereinafter described and pointed out particularly in the appended claims.

Referring to the accompanying drawings,

Figure 1 is a plan view of a portion of a melting pot with its supports and operating mechanism for raising, lowering and turning the same into and out of posltlon.

Fig. 2 is an elevation showing the vertical shaft which is mounted in fixed supports or brackets on the machine frame, together with the vertically movable melting pot support and means for moving the same vertically.

Fig. 3 is a detail elevation showing the vertical and inclined shafts with the toothed rack and gearing.

Fig. 4 is a view of the melting pot support alone, the point of observation being indicated by the arrow 4: in Fig. 1.

Like reference characters indicate the same parts throughout the several figures.

1 indicates the fixed supports or brackets mounted on or forming a part of the frame 2 of the casting machine. These brackets or fixed supports 1 are arranged to carry a vertical shaft 3 conveniently journaled so as to be capable of rotary movement in the brackets, but held against longitudinal movement therein, preferably by a nut 4 applied to its reduced lower end below the lower bracket. The intermediate portion of the shaft 3 is provided or formed with a gear rack 4 preferably having inclined teeth, and surrounding the shaft is a sleeve 5 capable of moving longitudinally or vertically thereon. Integral with or suitably connected to said sleeve is a bracket 6 which constitutes the base upon which the melting pot 7 is supported. In addition to the bracket 6 the sleeve 5 carries a diagonally arranged bracket 8 in which is journaled a diagonally arranged operating shaft 9, provided at the upper end with a handle 10 whereby the shaft may be rotated. The lower end ofthe shaft is provided with a gear wheel 11 having spirally arranged teeth meshing with the teeth& on the verticalshaft 3, the arrangement of the teeth being such that rotation of the shaft 9 will raise or lower the sleeve together with the bracket and melting pot, and the angle of the teeth is preferably such that the parts will be automatically locked in the position to which they may be adjusted.-

The sleeve, melting pot and brackets carried by the sleeve, together with the shaft 3, are all capable of rotation about the vertical' axis of the shaft 3, but to prevent such movement when the melting pot is in its elevated position, where the nozzle of the melting pot cooperates with the seat beneath the mold of the casting machine, suitable lugs 12 and 13 are provided on the melting pot and fixed frame, respectively, which will cooperate to prevent such rotation until the melting pot has been lowered to a position where the nozzle and its seat are out of engagement with each other.

The bracket 8 in which the shaft 9 is journaled is preferably formed with open sides, and an antifriction thrust bearing 1 is located within the bracket 8 to support the load imposed on the shaft by the weight of the melting pot and attached parts, lock nuts 15 being provided at the ends of the bracket 8 for holding, the parts in adjusted position.

To prevent binding between the sleeve 5 and the lower fixed support or bracket 1 such as would resist the turning movement of the parts when the melting pot is to be swung of to one side, a sleeve 16 is interposed around the reduced lower end of the shaft 3 and the upper end of the sleeve 16 is adapted to support the sleeve 5 together with the melting pot and attached parts when in its lowered position, said sleeve 16 in effect forming an abutment on the shaft itself, which will support the weight of the parts, and prevent the same from binding against the top and bottom of the lower bracket 1. v

The crank handle 10by which the shaft 9 is rotated, is normally located in a position at one side of the melting pot, and is conveniently accessible to the attendant when standing on the front side of the machine. The handle 17 by which the melting pot may be swung into and out of position projects from the melting pot at a point in proximity to the handle 10; thus, the attendant, standing at the front of the machine, may both raise and lower the melting pot as well as swing the same into and out of position for cooperation with the nozzle.

Save where particularly specified in the claims, it is not desired to limit the invention to the particular form of gearing between the two shafts, for other known forms of gearing may be employed.

lVhat is claimed is: v

1. A raising and lowering mechanism for the melting pots of type casting machines, embodying a vertical shaft mounted in fixed supports and having teeth thereon, a melt ing pot support mounted to slide vertically on the shaft, a second shaft journaled in bearings in the melting pot support to move vertically therewith and having an operating handle at the upper end at one side of the pot, and a toothed gear connected with said lastmentioned shaft to be rotated thereby and engaging the teeth on the firstmentioned shaft.

2. A raising and lowering mechanism forthe melting pots of type casting machines embodying a vertical shaft mounted in fixed supports and having a gear rack formed thereon, a melting pot support mounted to slide vertically on the shaft, a second shaft journaled in hearings in the melting pot support to move vertically therewith and having an operating handle at the upper end at one side of the pot, a. gear wheel mounted on the lower end of the last-mentioned shaft, to be rotated thereby and meshing with the gear rack on the first mentioned shaft.

3. A raising and lowering mechanism for the melting pots of type casting machines, embodying a vertical shaft journaled in fixed supports and having rack teeth, a melting pot support mounted to move vertically on the shaft, a second shaft journaled in hearings in the melting pot support to move vertically therewith and having an operating handle at the upper end at one side of the pot, and a gear wheel connected with said last mentioned shaft to be rotated thereby and having spirally arranged teeth, meshing with the rack teeth on the firstmentioned shaft, whereby by the rotation of the shaft journaled in the melting pot support said support may be raised or lowered and locked in its adjusted position.

4:. i1 raising and lowering mechanism for the melting pots of type casting machines embodying a vertical shaft journaled in fixed supports and having a gear rack formed thereon, a melting pot supporting sleeve slidably mounted on the vertical shaft, a second shaft journaled in bearings supported by said sleeve, a melting pot bracket carried by said sleeve, an operating handle mounted on the upper end of the shaft carried by the sleeve, a gear wheel having spirally arranged teeth mounted on the lower end of said last-mentioned shaft and meshing with the gear rack on the vertical shaft, and a thrust bearing interposed between said second shaft and the bearing therefor carried by the sleeve, substantially as described.

5. A raising and lowering mechanism for the melting pots of type casting machines embodying a vertical shaft mounted in fixed supports, and having a gear rack formed thereon, amelting pot supporting sleeve mounted to move vertically on the shaft, a melting pot bracket carried by the sleeve, an operating shaft bracket also carried by the sleeve, a diagonally arranged operating shaft journaled in the last-mentioned bracket, an operating handle at the upper end of said operating shaft, and a spiral toothed gear carried by the lower end of said operating shaft and meshing with the gear rack on the vertical shaft.

6. A raising and lowering mechanism for the melting pots of type casting machines, embodying a vertical shaft mounted in fixed supports and having rack teeth formed thereon, a melting pot supporting sleeve mounted to move verticallv on said shaft and having a melting pot supporting bracket thereon, a diagonally arranged shaft mounted in bearings carried by said sleeve and having an operating handle at its upper end, a gear rotated by said last-mentioned shaft and in mesh with the rack teeth on the vertical shaft, and an abutment carried by said vertical shaft, on which the sleeve rests 10 when at the lower extreme of its movement, whereby binding between the melting pot supporting sleeve and fixed support for the vertical shaft is prevented.

JOHN SELLERS BANCROFT.

MAURITZ C. INDAHL.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

